TWI773224B - Variable Damping Shock Absorber - Google Patents

Abstract

A variable damping buffer comprises an outer casing, a piston rod, two piston blocks, a first elastic element, a conical seat and a second elastic element. The two piston blocks are spaced apart and fixedly arranged on one end of the piston rod, the conical seat is movably arranged between the two piston blocks, and the first elastic element is arranged between the closed end of the outer casing and the one piston block During the time, the second elastic element is arranged between the conical seat and the other piston block, and a conical surface is formed in the middle section of the conical seat and at least a third piston rubber ring is movably sleeved; accordingly , the present creation utilizes the first elastic element and the frictional force generated by the extrusion between the conical seat surface and the outer casing after the third piston rubber ring is pressed and moved, so as to generate the frictional force when the pressure channel is different Different damping effects.

Description

Variable Damping Shock Absorber

This creation belongs to the field of slide rail buffer devices, especially a variable damping buffer installed in a slide rail, used to buffer the force when the drawer drives the slide rail to retract, and its variable damping design can provide The buffer effect of different slide rails under different stress states.

Press, in order to facilitate the opening or closing of the drawers in the furniture, various slide rail structures are mostly installed to assist the labor-saving effect when opening or closing the drawers, and, in order to improve the convenience and safety of use, usually also In this kind of slide rail structure, such as: drawer interlocking function, automatic closing function or buffering function when closed, and self-closing buffering function combining automatic closing and buffering functions at the same time, etc. are added. Among them, the buffer function is a very important function, which can avoid the damage of the slide rail structure, and further reduce the collision and abnormal noise during use. It mainly provides resistance against reverse movement through a buffer to control the slide rail. The speed control of the last stage when retracting, if the drawer can be closed automatically and slowly, it will not make a huge noise, and it will not cause damage to the drawer or sliding rail structure. At present, common buffers on the market are based on their internal buffer The source of resistance can be divided into two types: pneumatic type and hydraulic type. The volume compressibility of gas or liquid is used to provide the effect of buffering resistance.

However, the biggest disadvantage of the above two buffers is that there will be problems such as oil leakage or air leakage. Although with the progress of manufacturing methods, most of the solutions to these oil leakage or air leakage problems can be obtained, but there are some problems in their structure. The parts that belong to consumables will still cause elastic fatigue or loss due to prolonged use, resulting in oil leakage, air leakage and other problems, although these problems can still pass through Replacement of consumables and refurbishment of fluids, etc., will still cause great inconvenience in use or operation.

Taking a general hydraulic shock absorber as an example, its structure is that when a shaft rod is pulled out or pushed in, a small gap is formed around a piston block on the shaft rod for hydraulic oil to pass through, so that the The axis rod can effectively achieve the state of slow sliding, but in fact, because the hydraulic oil has the physical characteristics of the incompressible volume of the fluid, it will generate a large buffer resistance, which will prolong the recovery time of the slide rail structure, and may be due to The buffer resistance is too large, which causes the sliding rail structure to be interfered with by the resistance and cannot be fully retracted. Therefore, other elastic structures must be used as a means of recovery. Otherwise, the traction force will be gradually degraded and fatigued under long-term use. And affect the function of automatic reset. Furthermore, such as the Republic of China Invention Patent Publication No. I225533 and the New Patent No. M329092, the rubber damping is used to rub against the inner wall surface of the hollow tube body to provide the required buffer resistance, so the conventional gas can be omitted. , liquid and other buffer fluids, but in fact, this becomes a method of fixed resistance. It is difficult to provide the buffer resistance that meets the demand for the method of the sliding rail structure as a variable force, so it is necessary to improve it.

In view of this, the creator has carefully designed a variable damping buffer, which is different from the common slide rail buffer which only uses fixed damping generated by gas, damping oil, elastic element, or rubber. When the drawer force (pressure channel) is different, the method of fixed damping cannot change the output damping effect according to the pressure channel required for different operations, so it cannot meet the needs of actual operation. The special design of this creation can solve the general problem. The shortcomings of the slide rail buffer in operation and use can be produced according to different pressure channels to produce different damping outputs to meet the needs of actual operation.

One of the objectives of the present invention is to provide a variable damping buffer, which includes an outer casing, a piston rod, two piston blocks, a first elastic element, a conical seat and a second elastic element. A conical surface is formed in the middle section of the conical seat, and at least one third piston rubber ring is movably sleeved. Under the fixed damping operation provided by the original first elastic element, additional damping effect is added, so that it can be under pressure. Different channels produce different damping effects at the same time to meet the needs of actual operation.

In order to achieve the above-mentioned purpose, the variable damping buffer of this creation is used to be quickly installed inside a slide rail for buffering the force when the slide rail is forced to retract inward, and it includes: an outer casing, which is It is a round tubular thin shell structure, and the two ends of the outer shell are recessed inward to form a ring edge for installing two stop blocks, each stop block is provided with a through hole in the center; a piston rod, the two ends of which are They are a first end and a second end respectively, and the first end is movably arranged inside the outer casing, and the second end is extended and exposed outside the outer casing for connection purposes; two piston blocks, which are Including a first piston block and a second piston block, the first piston block is arranged on the first end of the piston rod, and the second piston block is arranged on the piston rod on one side of the first piston block at intervals , and a first piston rubber ring is arranged between the first piston block and the inner wall of the outer casing to form an airtightness, and a second piston rubber ring is arranged between the second piston block and the inner wall of the outer casing to form an airtightness ; A first elastic element, which is arranged between one end of the outer casing and the first piston block, by the resilience of the first elastic element, the piston rod can be stretched out when it is not stressed; a conical seat, It is movably arranged between the first piston block and the second piston block, and the middle section of the conical seat forms a conical surface corresponding to the moving direction of the piston rod, and at least one conical surface is movably sleeved on the conical surface. a third piston rubber ring, which can move on the conical surface with the relative displacement of the piston rod; and a second elastic element disposed between the conical seat and the second piston block , the conical seat is abutted against the first piston block by the resilience of the second elastic element; accordingly, when the pressurized pressure increases, The third piston rubber ring moves to the closest point between the surface of the conical seat and the inner surface of the outer shell, and squeezes with the inner surface of the outer shell to increase the frictional force and achieve the effect of increasing the damping.

In one embodiment, the length of the first elastic element is pre-compressed and equal to the length of the outer casing minus the distance from the first piston block to the second piston block, and the length of the second elastic element is After preloading, it is equal to the distance between the first piston block and the second piston block minus the length of the conical seat.

In another embodiment, the center of the first piston block of the present invention is provided with a first fixing hole corresponding to the piston rod, and the center of the second piston block is provided with a second fixing hole corresponding to the piston rod, and in A first ring groove is formed around the first piston block corresponding to the first piston rubber ring, and a second ring groove is formed around the second piston block corresponding to the second piston rubber ring; furthermore , the center of the conical seat is provided with a through hole corresponding to the piston rod, and the two ends of the conical seat are respectively provided with a ring retaining wall corresponding to the third piston rubber ring, so that the third piston rubber ring can only be in the two It should be noted that the conical surface of the conical seat has a set angle with respect to the moving direction of the piston rod, and the set angle is between 60 degrees and 75 degrees.

1: Buffer with variable damping

11: Outer body

111: Rim

112: stop block

1121: Through hole

12: Piston rod

121: First End

122: Second End

13: Piston block

131: The first piston block

1311: First Piston Rubber Ring

1312: The first fixing hole

1313: The first ring groove

132: Second piston block

1321: Second Piston Rubber Ring

1322: Second fixing hole

1323: Second ring groove

14: The first elastic element

15: Cone seat

151: Conical surface

152: Third piston rubber ring

153: Through hole

154: Ring Retaining Wall

16: The second elastic element

θ: set angle

FIG. 1 is an exploded perspective view of a preferred embodiment of the present invention.

FIG. 2 is a three-dimensional appearance view after assembly of the preferred embodiment of the present invention.

FIG. 3 is a cross-sectional view after assembly of the preferred embodiment of the present invention.

FIG. 4 is a schematic diagram (1) of the state when the preferred embodiment of the present invention is actuated.

FIG. 5 is a schematic diagram (2) of the state when the preferred embodiment of the present invention is actuated.

FIG. 6 is a schematic diagram (3) of the state when the preferred embodiment of the present invention is actuated.

In order for your reviewers to have a clear understanding of the content of this creation, please refer to the following descriptions and drawings.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which are three-dimensional exploded views of a preferred embodiment of the present invention, as well as its assembled three-dimensional appearance and cross-sectional views; please refer to FIGS. 4 to 6 , which are the present invention. Schematic diagrams of various states when the preferred embodiment is actuated. As shown in the above figures, the variable damping shock absorber 1 of the present invention includes an outer casing 11 , a piston rod 12 , two piston blocks 13 , a first elastic element 14 , a conical seat 15 and a second The elastic element 16 is used to be quickly installed inside a slide rail (not shown in the figure) for buffering the force when the slide rail is forced to retract inward.

The outer casing 11 is a cylindrical thin shell structure, and two ends of the outer casing 11 are recessed inward to form a ring edge 111 for installing two stop blocks 112 , and a center of each stop block 112 is provided with a ring edge 111 . Via 1121.

Two ends of the piston rod 12 are a first end 121 and a second end 122 respectively, and the first end 121 is movably disposed inside the outer casing 11 , and the second end 122 extends and exposes the outer casing The outside of 11 is used for connection; it should be noted that the second end 122 passes through the through hole 1121 of one of the stoppers 112 , and the other stopper 112 is used for ventilation.

The two piston blocks 13 include a first piston block 131 and a second piston block 132 , the first piston block 131 is disposed at the first end 121 of the piston rod 12 , and the second piston block 132 is spaced apart from the The piston rod 12 on one side of the first piston block 131 is provided with a first piston rubber ring 1311 between the first piston block 131 and the inner wall surface of the outer casing 11 to form an air tightness, and the second piston block 132 A second piston rubber ring 1321 is arranged between the inner wall surface of the outer casing 11 to form an airtightness; in addition, the center of the first piston block 131 is provided with a first fixing hole 1312 corresponding to the piston rod 12, and the second A second fixing hole 1322 is formed in the center of the piston block 132 corresponding to the piston rod 12 , and a first ring groove is formed around the first piston block 131 corresponding to the first piston rubber ring 1311 1313, and a second ring groove 1323 is formed around the second piston block 132 corresponding to the second piston rubber ring 1321.

The first elastic element 14 is disposed between one end of the outer casing 11 and the first piston block 131 . The length of the first elastic element 14 is pre-pressed, and is equal to the length of the outer casing minus the first piston The distance from the block to the second piston block can therefore be used to make the piston rod 12 extend outwards when it is not stressed by the resilience of the first elastic element 14 .

The conical seat 15 is movably disposed between the first piston block 131 and the second piston block 132 , and the middle portion of the conical seat 15 forms a conical surface 151 corresponding to the moving direction of the piston rod 12 , and A pair of third piston rubber rings 152 are movably sleeved on the conical surface 151, and the third piston rubber rings 152 can move on the conical surface 151 with the relative displacement of the piston rod 12; and the conical seat The center of 15 is provided with a through hole 153 corresponding to the piston rod 12, and the two ends of the conical seat 15 are respectively provided with a ring retaining wall 154 corresponding to the third piston rubber ring 152, so that the pair of third piston rubber rings 152 can only be used. move between the second ring retaining walls 154 . It should be noted that the conical surface 151 of the conical seat 15 has a predetermined angle θ with respect to the moving direction of the piston rod 12 , and the predetermined angle θ is between 60 degrees and 75 degrees.

The second elastic element 16 is disposed between the conical seat 15 and the second piston block 132, and the conical seat 15 is abutted against the first piston block 131 by the resilience of the second elastic element 16; and, The length of the second elastic element 16 is preloaded, and is equal to the distance between the first piston block 131 and the second piston block 132 minus the length of the conical seat 15 .

Accordingly, when the variable damping shock absorber 1 of the present invention is in normal use, when the second end of the piston rod is pressed, it will squeeze the first elastic element to produce a fixed damping effect; When the pressure of the piston rod increases, the conical seat will move to the closest position between the surface of the conical seat and the inner surface of the outer casing due to the two and third piston rubber rings, and press against the inner surface of the outer casing. and increase the frictional force, thus providing the effect of increasing the damping; and, when the applied pressure is released Then, through the restoring elastic force of the first elastic element and the second elastic element, the piston blocks and the conical seat are returned to their original positions, so as to achieve different damping effects when the pressure channels are different, and can be more Meet the needs of actual operation.

However, the above descriptions are only preferred embodiments of the present creation, and are not intended to limit the scope of the present creation. Therefore, those with ordinary knowledge in the technical field may make equivalent or easy The equivalent changes and modifications made without departing from the spirit and scope of this creation shall be covered by the patent scope of this creation.

1: Buffer with variable damping

11: Outer body

111: Rim

112: stop block

1121: Through hole

12: Piston rod

121: First End

122: Second End

13: Piston block

131: The first piston block

1311: First Piston Rubber Ring

1312: The first fixing hole

1313: The first ring groove

132: Second piston block

1321: Second Piston Rubber Ring

1322: Second fixing hole

1323: Second ring groove

14: The first elastic element

15: Cone seat

151: Conical surface

152: Third piston rubber ring

153: Through hole

154: Ring Retaining Wall

16: The second elastic element

Claims (6)

A variable damping buffer, which is used to be quickly installed inside a slide rail to buffer the force when the slide rail is forced to retract inward, comprising: an outer shell, which is a round tubular thin shell structure , and the two ends of the outer shell are recessed inward to form a ring edge for installing two stop blocks, each stop block is provided with a through hole in the center; a piston rod, the two ends of which are a first end and a a second end, and the first end is movably arranged inside the outer casing, and the second end extends and is exposed outside the outer casing for connection; two piston blocks, which include a first piston block and a second piston block, the first piston block is disposed on the first end of the piston rod, and the second piston block is disposed on the piston rod on one side of the first piston block at intervals, and the first piston block A first piston rubber ring is arranged between the inner wall of the outer casing to form an airtightness, and a second piston rubber ring is arranged between the second piston block and the inner wall of the outer casing to form an airtightness; a first elastic element, It is arranged between one end of the outer casing and the first piston block, and the piston rod can be extended outwards when it is not stressed by the resilience of the first elastic element; a conical seat is movably arranged on the first piston Between the block and the second piston block, and the middle section of the conical seat forms a conical surface corresponding to the moving direction of the piston rod, and at least a third piston rubber ring is movably sleeved on the conical surface. The third piston rubber ring can move on the conical surface along with the relative displacement of the piston rod; and a second elastic element is arranged between the conical seat and the second piston block, by means of the second elastic element The recovery elasticity makes the conical seat close to the first piston block; accordingly, when the pressure of pressurization becomes larger, the third piston rubber ring moves to the surface of the conical seat and the inner surface of the outer casing that is the most approach, and squeeze each other with the inner surface of the outer casing to increase the frictional force and achieve the effect of increasing the damping. The variable damping shock absorber as claimed in claim 1, wherein the length of the first elastic element is preloaded and equal to the length of the outer casing minus the distance from the first piston block to the second piston block . The variable damping shock absorber of claim 1, wherein the length of the second elastic element is preloaded and equal to the distance between the first piston block and the second piston block minus the cone the length of the seat. The variable damping shock absorber as claimed in claim 1, wherein the center of the first piston block is provided with a first fixing hole corresponding to the piston rod, and the center of the second piston block is provided with a second hole corresponding to the piston rod. The fixing hole is provided with a first ring groove around the first piston block corresponding to the first piston rubber ring, and a first ring groove is arranged around the second piston block corresponding to the second piston rubber ring. Two ring grooves. The variable damping shock absorber according to claim 1, wherein the center of the conical seat is provided with a through hole corresponding to the piston rod, and two ends of the conical seat are respectively provided with a ring corresponding to the third piston rubber ring A retaining wall, so that the third piston rubber ring can only move between the second ring retaining walls. The variable damping shock absorber as claimed in claim 5, wherein the conical surface of the conical seat has a set angle with respect to the moving direction of the piston rod, and the set angle is between 60 degrees and 75 degrees. between degrees.

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